Coil component

Abstract

The coil component includes an element body, a coil, a first electrode part and a second electrode part. The element body includes a main surface to be used as a mounting surface. The coil is disposed in the element body. The first electrode part and the second electrode part are spaced apart from each other in a first direction, embedded in the element body in such a way as to be exposed from the main surface, and electrically connected to the coil. The first electrode part includes a first surface exposed from the main surface and a protrusion disposed in the element body in such a way as to be spaced apart from the main surface. The protrusion protrudes more toward the second electrode part than the first surface in the first direction.

1 . A coil component comprising:
 an element body including a main surface to be used as a mounting surface;   a coil disposed in the element body; and   a first electrode part and a second electrode part spaced apart from each other in a first direction, embedded in the element body in such a way as to be exposed from the main surface, and electrically connected to the coil,   wherein the first electrode part includes a first surface exposed from the main surface and a protrusion disposed in the element body in such a way as to be spaced apart from the main surface, and   the protrusion protrudes more toward the second electrode part than the first surface in the first direction.   
     
     
         2 . The coil component according to  claim 1 , wherein a glass content of the first electrode part is 20% or less. 
     
     
         3 . The coil component according to  claim 1 , wherein
 the first electrode part is a plating conductor.   
     
     
         4 . The coil component according to  claim 1 , wherein the first electrode part includes a second surface facing away from the first surface and joined to the element body, and
 a surface roughness of the second surface is greater than a surface roughness of the first surface.   
     
     
         5 . The coil component according to  claim 1 , wherein the element body includes a plurality of soft magnetic metal particles. 
     
     
         6 . The coil component according to  claim 1 , wherein a length of the first electrode part in a second direction orthogonal to the main surface is 5% or more and 40% or less of a length of the element body in the second direction. 
     
     
         7 . The coil component according to  claim 1 , wherein the protrusion has a tapered shape. 
     
     
         8 . The coil component according to  claim 7 , wherein a length of the protrusion in a second direction orthogonal to the main surface decreases toward the second electrode part. 
     
     
         9 . The coil component according to  claim 4 , wherein the surface roughness of the second surface is 1.1 times or more and 10 times or less that of the first surface. 
     
     
         10 . The coil component according to  claim 4 , wherein an area of the second surface is larger than an area of the first surface when viewed from a second direction orthogonal to the main surface. 
     
     
         11 . The coil component according to  claim 1 , wherein the second electrode part includes a third surface exposed from the main surface and a protrusion disposed in the element body in such a way as to be spaced apart from the main surface, and
 the protrusion of the second electrode part protrudes more toward the first electrode part than the third surface in the first direction.   
     
     
         12 . The coil component according to  claim 1 , wherein the element body includes a plurality of element body layers in a second direction orthogonal to the main surface. 
     
     
         13 . The coil component according to  claim 12 , wherein the plurality of element body layers includes a plurality of soft magnetic metal particles. 
     
     
         14 . The coil component according to  claim 13 , wherein the plurality of element body layers includes a resin that is present between the plurality of soft magnetic metal particles. 
     
     
         15 . The coil component according to  claim 14 , wherein the resin has an electrical insulating property. 
     
     
         16 . The coil component according to  claim 1 , wherein a length in a second direction orthogonal to the main surface is 5 μm or more and 50 μm or less. 
     
     
         17 . The coil component according to  claim 1 , wherein the first surface forms the same plane as the main surface.